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<div class="titlepage"><div><div><h5 class="title">
<a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable"></a><a name="structboost_1_1geometry_1_1index_1_1indexable"></a><a class="link" href="boost__geometry__index__indexable.html" title="boost::geometry::index::indexable">boost::geometry::index::indexable</a>
</h5></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___">operator()(Value
            const &amp;)</a></span></dt>
<dt><span class="section"><a href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___">operator()(V
            const &amp;)</a></span></dt>
</dl></div>
<p>
            <a class="indexterm" name="idm89496"></a><a class="indexterm" name="idm89498"></a><a class="indexterm" name="idm89500"></a><a class="indexterm" name="idm89502"></a>
The function object extracting Indexable from Value.
          </p>
<h6>
<a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.h0"></a>
            <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.description"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.description">Description</a>
          </h6>
<p>
            It translates Value object to Indexable object. By default, it can handle
            Values which are Indexables, std::pair&lt;Indexable, T2&gt;, boost::tuple&lt;Indexable,
            ...&gt; and std::tuple&lt;Indexable, ...&gt; if STD tuples and variadic
            templates are supported.
          </p>
<h6>
<a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.h1"></a>
            <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.header"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.header">Header</a>
          </h6>
<p>
            <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">index</span><span class="special">/</span><span class="identifier">indexable</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
          </p>
<h6>
<a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.h2"></a>
            <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.synopsis"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.synopsis">Synopsis</a>
          </h6>
<pre class="programlisting"><code class="computeroutput"><span class="keyword">template</span><span class="special">&lt;</span></code><code class="computeroutput"><span class="keyword">typename</span> <span class="identifier">Value</span></code><code class="computeroutput"><span class="special">&gt;</span></code>
<code class="computeroutput"><span class="keyword">struct</span> <span class="identifier">indexable</span></code>
<code class="computeroutput"><span class="special">{</span></code>
<code class="computeroutput">  <span class="comment">// ...</span></code>
<code class="computeroutput"><span class="special">};</span></code>
</pre>
<h6>
<a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.h3"></a>
            <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.template_parameter_s_"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.template_parameter_s_">Template
            parameter(s)</a>
          </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                    <p>
                      Parameter
                    </p>
                  </th>
<th>
                    <p>
                      Description
                    </p>
                  </th>
</tr></thead>
<tbody><tr>
<td>
                    <p>
                      <code class="computeroutput"><span class="identifier">Value</span></code>
                    </p>
                  </td>
<td>
                    <p>
                      The Value type which may be translated directly to the Indexable.
                    </p>
                  </td>
</tr></tbody>
</table></div>
<h6>
<a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.h4"></a>
            <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.typedef_s_"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.typedef_s_">Typedef(s)</a>
          </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                    <p>
                      Type
                    </p>
                  </th>
<th>
                    <p>
                      Description
                    </p>
                  </th>
</tr></thead>
<tbody><tr>
<td>
                    <p>
                      <a name="structboost_1_1geometry_1_1index_1_1indexable_1af6f21324f6484330b9deb0ee0629f4b4"></a><code class="computeroutput"><span class="identifier">result_type</span></code>
                    </p>
                  </td>
<td>
                    <p>
                      The type of result returned by function object. It should be
                      const Indexable reference.
                    </p>
                  </td>
</tr></tbody>
</table></div>
<h6>
<a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.h5"></a>
            <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.member_s_"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.member_s_">Member(s)</a>
          </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                    <p>
                      Modifier
                    </p>
                  </th>
<th>
                    <p>
                      Function
                    </p>
                  </th>
<th>
                    <p>
                      Description
                    </p>
                  </th>
</tr></thead>
<tbody>
<tr>
<td>
                    <p>
                      <code class="computeroutput"><span class="keyword">const</span></code>
                    </p>
                  </td>
<td>
                    <p>
                      <a class="link" href="boost__geometry__index__indexable.html#structboost_1_1geometry_1_1index_1_1indexable_1a0bbe640be9ae0475e1b56f5b2e08877e"><code class="computeroutput"><span class="keyword">operator</span><span class="special">()(</span><span class="identifier">Value</span> <span class="keyword">const</span>
                      <span class="special">&amp;)</span></code></a>
                    </p>
                  </td>
<td>
                    <p>
                      Return indexable extracted from the value.
                    </p>
                  </td>
</tr>
<tr>
<td>
                    <p>
                      <code class="computeroutput"><span class="keyword">const</span></code>
                    </p>
                  </td>
<td>
                    <p>
                      <a class="link" href="boost__geometry__index__indexable.html#structboost_1_1geometry_1_1index_1_1indexable_1a4aa66ffe2975f655bada9e6b5a65317b"><code class="computeroutput"><span class="keyword">operator</span><span class="special">()(</span><span class="identifier">V</span> <span class="keyword">const</span>
                      <span class="special">&amp;)</span></code></a>
                    </p>
                  </td>
<td>
                    <p>
                      Return indexable extracted from the value. Overload for types
                      compatible with Value but different yet holding referencable
                      Indexable, e.g. tuple containing a reference.
                    </p>
                  </td>
</tr>
</tbody>
</table></div>
<div class="section">
<div class="titlepage"><div><div><h6 class="title">
<a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___"></a><a name="structboost_1_1geometry_1_1index_1_1indexable_1a0bbe640be9ae0475e1b56f5b2e08877e"></a><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___" title="operator()(Value const &amp;)">operator()(Value
            const &amp;)</a>
</h6></div></div></div>
<p>
              <a class="indexterm" name="idm89636"></a>
Return indexable extracted from the value.
            </p>
<h7><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___.h0"></a>
              <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___.synopsis"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___.synopsis">Synopsis</a>
            </h7><pre class="programlisting"><code class="literal"><a class="link" href="boost__geometry__index__indexable.html#structboost_1_1geometry_1_1index_1_1indexable_1af6f21324f6484330b9deb0ee0629f4b4">result_type</a></code> <code class="computeroutput"><span class="keyword">operator</span><span class="special">()</span></code><code class="computeroutput"><span class="special">(</span></code><code class="computeroutput"><span class="identifier">Value</span> <span class="keyword">const</span> <span class="special">&amp;</span></code> <code class="computeroutput"><span class="identifier">v</span></code><code class="computeroutput"><span class="special">)</span></code>
</pre>
<h7><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___.h1"></a>
              <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___.modifier_s_"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___.modifier_s_">Modifier(s)</a>
            </h7><p>
</p>
<pre class="programlisting"><span class="keyword">const</span></pre>
<p>
            </p>
<h7><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___.h2"></a>
              <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___.parameter_s_"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___.parameter_s_">Parameter(s)</a>
            </h7><div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                      <p>
                        Type
                      </p>
                    </th>
<th>
                      <p>
                        Name
                      </p>
                    </th>
<th>
                      <p>
                        Description
                      </p>
                    </th>
</tr></thead>
<tbody><tr>
<td>
                      <p>
                        <code class="computeroutput"><span class="identifier">Value</span> <span class="keyword">const</span>
                        <span class="special">&amp;</span></code>
                      </p>
                    </td>
<td>
                      <p>
                        <code class="computeroutput"><span class="identifier">v</span></code>
                      </p>
                    </td>
<td>
                      <p>
                        The value.
                      </p>
                    </td>
</tr></tbody>
</table></div>
<h7><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___.h3"></a>
              <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___.returns"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___value_const___.returns">Returns</a>
            </h7><p>
              The indexable.
            </p>
</div>
<div class="section">
<div class="titlepage"><div><div><h6 class="title">
<a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___"></a><a name="structboost_1_1geometry_1_1index_1_1indexable_1a4aa66ffe2975f655bada9e6b5a65317b"></a><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___" title="operator()(V const &amp;)">operator()(V
            const &amp;)</a>
</h6></div></div></div>
<p>
              <a class="indexterm" name="idm89699"></a>
Return indexable extracted from the value. Overload for types compatible
              with Value but different yet holding referencable Indexable, e.g. tuple
              containing a reference.
            </p>
<h7><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___.h0"></a>
              <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___.synopsis"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___.synopsis">Synopsis</a>
            </h7><pre class="programlisting"><code class="computeroutput"><span class="keyword">template</span><span class="special">&lt;</span></code><code class="computeroutput"><span class="keyword">typename</span> <span class="identifier">V</span></code><code class="computeroutput"><span class="special">&gt;</span></code>
<code class="literal"><a class="link" href="boost__geometry__index__indexable.html#structboost_1_1geometry_1_1index_1_1indexable_1af6f21324f6484330b9deb0ee0629f4b4">result_type</a></code> <code class="computeroutput"><span class="keyword">operator</span><span class="special">()</span></code><code class="computeroutput"><span class="special">(</span></code><code class="computeroutput"><span class="identifier">V</span> <span class="keyword">const</span> <span class="special">&amp;</span></code> <code class="computeroutput"><span class="identifier">v</span></code><code class="computeroutput"><span class="special">)</span></code>
</pre>
<h7><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___.h1"></a>
              <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___.modifier_s_"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___.modifier_s_">Modifier(s)</a>
            </h7><p>
</p>
<pre class="programlisting"><span class="keyword">const</span></pre>
<p>
            </p>
<h7><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___.h2"></a>
              <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___.parameter_s_"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___.parameter_s_">Parameter(s)</a>
            </h7><div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                      <p>
                        Type
                      </p>
                    </th>
<th>
                      <p>
                        Name
                      </p>
                    </th>
<th>
                      <p>
                        Description
                      </p>
                    </th>
</tr></thead>
<tbody><tr>
<td>
                      <p>
                        <code class="computeroutput"><span class="identifier">V</span> <span class="keyword">const</span>
                        <span class="special">&amp;</span></code>
                      </p>
                    </td>
<td>
                      <p>
                        <code class="computeroutput"><span class="identifier">v</span></code>
                      </p>
                    </td>
<td>
                      <p>
                        The value.
                      </p>
                    </td>
</tr></tbody>
</table></div>
<h7><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___.h3"></a>
              <span class="phrase"><a name="geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___.returns"></a></span><a class="link" href="boost__geometry__index__indexable.html#geometry.reference.spatial_indexes.observers.boost__geometry__index__indexable.operator___v_const___.returns">Returns</a>
            </h7><p>
              The indexable.
            </p>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2009-2021 Barend Gehrels,
      Bruno Lalande, Mateusz Loskot, Adam Wulkiewicz, Oracle and/or its affiliates<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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